Can someone clue me in on the differences between these PDA's? I know the 210 and 211 are reported as identical.

I recently paid on Ebay for a 210 and an Otterbox to suit. The vendor of the 210 was then unable to fulfil my order, but the Otterbox (hard case) is on its way. 210s seem hard to find on Australian Ebay. There are a few 212's and 214's around but its not clear what the differences are and whether the 212 and 214 have Pocket Word and Excel loaded. Are 212 & 214 later releases?